Changeset 12055 for branches/SymbolicExpressionTreeDiversityAnalyzers/HeuristicLab.Problems.DataAnalysis.Symbolic

Timestamp:

02/23/15 15:29:05 (10 years ago)

Author:

bburlacu

Message:

#2326: Implemented a workaround for the case in which both sequences have zero variance, and decided to return a similarity value of 1.

File:

• branches/SymbolicExpressionTreeDiversityAnalyzers/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/TreeMatching/SymbolicExpressionTreePhenotypicSimilarityCalculator.cs (modified) (1 diff)

branches/SymbolicExpressionTreeDiversityAnalyzers/HeuristicLab.Problems.DataAnalysis.Symbolic/3.4/TreeMatching/SymbolicExpressionTreePhenotypicSimilarityCalculator.cs

@@ -68 +68 @@
       var leftValues = (DoubleArray)leftSolution.Variables["EstimatedValues"].Value;
       var rightValues = (DoubleArray)rightSolution.Variables["EstimatedValues"].Value;
+
+      if (leftValues.Variance().IsAlmost(0) && rightValues.Variance().IsAlmost(0))
+        return 1.0;
+
       OnlineCalculatorError error;
       var r2 = OnlinePearsonsRSquaredCalculator.Calculate(leftValues, rightValues, out error);